Working with ExpressionsFill in each of the blanks in the following sentences with a suitable preposition or adverb.1. Although they are roommates, they are not close _______each other.2. For them, there is no social life to speak _______. They are too busy.3. I’m afraid that he will be overcome _______shock on hearing the news.4. Don’t try to travel to too many places _______a time. You will be tired out.5. Our next discussion will focus _______how to improve the city’s air quality.6. Contrary _______what most of us believed, she is married and has already had a baby.7. _______the past three years, he has been attending evening classes to study English.8. He knew it was his carelessness that had caused the accident, but he didn’t want to admit _______it in public.